Car-coupling pins



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FREDERICK W. DAVIDSON, OF CLEVELAND, OHIO.

Letters Patent No. 96,782, dated November 16, 1869.'

IIPROVED MACHINE FCR ROLLING- CAR-COUPLING- PINS.

The Schedule referred to in these Letters Patent nnr making part of thes'zune.

I, FREDERICKNV. DAVIDSON, of Cleveland, in thecounty of Cuyahoga, andState of Ohio, have invented certain Improvements in a Mill for RollingShackle or Car-Coupling Pins, of which the following is a specitication.l

The nature of this invention relates to the construction of a mill forrolling shackle or oar-coupling p ns direetlyinto bars, the pinsbeing-formed-wth heads having eyes for attaching a chain.

Figure 1 is a side elevation.

Figure 2 is a vertical cross-section.

In the accompanying drawings- A represents a frame for supporting therollers B B, which rest ou a suit-able bed-plate, C.

In the frame Aare the boxes d, for the rollers B B.

On the top of the frame there is a bar, e, and screws e' e', which holdthe boxes in place.

The rollers are connected by gear-wheels g g.

The rollers B B, as will be seen in fig. 1, have grooves a a aroundthem, which are formed at proper intervals required for the length ofpins, with a space, a', larger than the groove, and broad enough tomake-a head to the pin.

Within this space'is a pointed projection, b, .which punches a hole inthe head, and at the same time spreads the metal intothe space a', thusforming the head. The two rollers being. alike, the projections andspaces meeting produce this result.

The projections b may have a hole through them, in the lower roller, asAseen in fig. 2, so that a ksmall portion of the metal may be out andpass int-o the centre of the rollers, which are hollow.

The groovesy at af', near the head-space, are reduced in size to form apoint to the pins, but do not out them entirely in two, so that the pinsare rolled out into long bars, and may he broken apart as maybe wanted;

Other grooves, c c, in the rollers, larger than the grooves a a, are forfirst reducing the iron into bars before passing them through thegrooves a a, and the grooves may be round or tlat, as represented.

By the use of a rolling-mill, of the construction described, shackle-pins used in coupling `railway-cars may be very rapidly andperfectly made, at a much less cost in time and labor than in theordinary way.

I claim, as my invention- The rollers B B, having grooves a, a formedaround them, with the spaces aand projections b to form the heads, andthe projections a" to form the points on shackle-pins, substantially inthe manner Vshown and for the purpose set forth.

FREDERICK W. DAVIDSON.

Witnesses GEO. W. TIBBrrrs, A. J. MARvlN.

